US5521903A - Port system for interfacing digital PBX to digital transmission facility - Google Patents
Port system for interfacing digital PBX to digital transmission facility Download PDFInfo
- Publication number
- US5521903A US5521903A US08/173,903 US17390393A US5521903A US 5521903 A US5521903 A US 5521903A US 17390393 A US17390393 A US 17390393A US 5521903 A US5521903 A US 5521903A
- Authority
- US
- United States
- Prior art keywords
- dsx
- transceiver
- pbx
- circuit
- digital
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation
- H04M3/244—Arrangements for supervision, monitoring or testing with provision for checking the normal operation for multiplex systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
- H04Q11/0407—Selecting arrangements for multiplex systems for time-division multiplexing using a stored programme control
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
Abstract
Description
Claims (14)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/173,903 US5521903A (en) | 1993-12-27 | 1993-12-27 | Port system for interfacing digital PBX to digital transmission facility |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/173,903 US5521903A (en) | 1993-12-27 | 1993-12-27 | Port system for interfacing digital PBX to digital transmission facility |
Publications (1)
Publication Number | Publication Date |
---|---|
US5521903A true US5521903A (en) | 1996-05-28 |
Family
ID=22634005
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US08/173,903 Expired - Lifetime US5521903A (en) | 1993-12-27 | 1993-12-27 | Port system for interfacing digital PBX to digital transmission facility |
Country Status (1)
Country | Link |
---|---|
US (1) | US5521903A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6425051B1 (en) | 2000-09-25 | 2002-07-23 | International Business Machines Corporation | Method, system, program, and data structures for enabling a controller accessing a storage device to handle requests to data in a first data format when the storage device includes data in a second data format |
US20020194547A1 (en) * | 2001-05-07 | 2002-12-19 | Christensen Daniel D. | Wiring fault detection, diagnosis and reporting for process control systems |
US6721313B1 (en) | 2000-08-01 | 2004-04-13 | International Business Machines Corporation | Switch fabric architecture using integrated serdes transceivers |
US20050089029A1 (en) * | 2001-09-27 | 2005-04-28 | Heiko Ruhnke | Method for operating a transmission system and transmission system in an energy supply network |
US20050232143A1 (en) * | 2004-04-20 | 2005-10-20 | Halliday David J | Method and apparatus for bypassing a payload node |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4675862A (en) * | 1984-11-27 | 1987-06-23 | American Telephone And Telegraph Company | Loop around data channel unit |
US4736409A (en) * | 1985-09-02 | 1988-04-05 | Kabushiki Kaisha Toshiba | Control data transmission system for private branch exchange |
US4860281A (en) * | 1988-02-29 | 1989-08-22 | Motorola, Inc. | Individual subchannel loopback in the PCM interfaces of a digital telephone exchange with control of the outbound path |
US4953195A (en) * | 1988-08-08 | 1990-08-28 | Kabushiki Kaisha Toshiba | Private branch exchange system with specific information transmitting function |
US5099474A (en) * | 1988-12-22 | 1992-03-24 | Kabushiki Kaisha Toshiba | Digital exchange and its control method |
US5121420A (en) * | 1990-09-17 | 1992-06-09 | Rolm Systems | Automatic line defect detector |
US5166925A (en) * | 1990-10-02 | 1992-11-24 | Ward Marvin W | T carrier network test apparatus and method |
US5208803A (en) * | 1990-11-19 | 1993-05-04 | Ag Communication Systems Corporation | Circuit for testing digital lines |
US5343461A (en) * | 1991-08-27 | 1994-08-30 | Ameritech Services, Inc. | Full duplex digital transmission facility loop-back test, diagnostics and maintenance system |
-
1993
- 1993-12-27 US US08/173,903 patent/US5521903A/en not_active Expired - Lifetime
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4675862A (en) * | 1984-11-27 | 1987-06-23 | American Telephone And Telegraph Company | Loop around data channel unit |
US4736409A (en) * | 1985-09-02 | 1988-04-05 | Kabushiki Kaisha Toshiba | Control data transmission system for private branch exchange |
US4860281A (en) * | 1988-02-29 | 1989-08-22 | Motorola, Inc. | Individual subchannel loopback in the PCM interfaces of a digital telephone exchange with control of the outbound path |
US4953195A (en) * | 1988-08-08 | 1990-08-28 | Kabushiki Kaisha Toshiba | Private branch exchange system with specific information transmitting function |
US5099474A (en) * | 1988-12-22 | 1992-03-24 | Kabushiki Kaisha Toshiba | Digital exchange and its control method |
US5121420A (en) * | 1990-09-17 | 1992-06-09 | Rolm Systems | Automatic line defect detector |
US5166925A (en) * | 1990-10-02 | 1992-11-24 | Ward Marvin W | T carrier network test apparatus and method |
US5208803A (en) * | 1990-11-19 | 1993-05-04 | Ag Communication Systems Corporation | Circuit for testing digital lines |
US5343461A (en) * | 1991-08-27 | 1994-08-30 | Ameritech Services, Inc. | Full duplex digital transmission facility loop-back test, diagnostics and maintenance system |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6721313B1 (en) | 2000-08-01 | 2004-04-13 | International Business Machines Corporation | Switch fabric architecture using integrated serdes transceivers |
US6425051B1 (en) | 2000-09-25 | 2002-07-23 | International Business Machines Corporation | Method, system, program, and data structures for enabling a controller accessing a storage device to handle requests to data in a first data format when the storage device includes data in a second data format |
US20020194547A1 (en) * | 2001-05-07 | 2002-12-19 | Christensen Daniel D. | Wiring fault detection, diagnosis and reporting for process control systems |
US20050089029A1 (en) * | 2001-09-27 | 2005-04-28 | Heiko Ruhnke | Method for operating a transmission system and transmission system in an energy supply network |
US20050232143A1 (en) * | 2004-04-20 | 2005-10-20 | Halliday David J | Method and apparatus for bypassing a payload node |
WO2005107112A1 (en) * | 2004-04-20 | 2005-11-10 | Motorola, Inc. | Method and apparatus for bypassing a payload node |
US6982952B2 (en) * | 2004-04-20 | 2006-01-03 | Motorola, Inc. | Method and apparatus for bypassing a payload node |
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